EP3123829B1 - Système de distribution de puissance à alimentation électrique par câble ethernet - Google Patents

Système de distribution de puissance à alimentation électrique par câble ethernet Download PDF

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Publication number
EP3123829B1
EP3123829B1 EP15711460.4A EP15711460A EP3123829B1 EP 3123829 B1 EP3123829 B1 EP 3123829B1 EP 15711460 A EP15711460 A EP 15711460A EP 3123829 B1 EP3123829 B1 EP 3123829B1
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EP
European Patent Office
Prior art keywords
power
units
over
lighting
ethernet
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Not-in-force
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EP15711460.4A
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German (de)
English (en)
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EP3123829A1 (fr
Inventor
Tony Petrus Van Endert
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Signify Holding BV
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Philips Lighting Holding BV
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Publication of EP3123829A1 publication Critical patent/EP3123829A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/18—Controlling the light source by remote control via data-bus transmission

Definitions

  • the invention relates to a Power-over-Ethernet power distribution system, a method of power distribution and computer program for distributing power.
  • a power supply or power sourcing equipment (PSE) in accordance with the Power-over-Ethernet (PoE) standard uses Ethernet cables for supplying direct current DC voltage to powered devices (PD) like lighting devices or the like.
  • Power-over-Ethernet systems are defined in IEEE 802.3.af and IEEE 802.3.at standard.
  • the Power-over-Ethernet systems allow a DC low voltage supply over low cost Ethernet cables (Cat5/6 cables).
  • the Power-over-Ethernet system according to the IEEE standards allows a power of up to 25.5 W (at 42.5 V - 57 V). In other words, an Ethernet network cabling environment is used as an independent DC power supply.
  • US 2012/0223650 A1 discloses a Power-over-Ethernet system for supplying lighting devices as powered devices with energy.
  • WO2013/128339A2 discloses a lighting device connected to two or more power source units.
  • a controller controls the power source units and determines which one is to power the lighting device. This allows, for example, to provide power to the lighting device by the power source unit that can most efficiently deliver the power.
  • WO2012/028981A1 discloses controlling power output of a port of a PSE based on rules or the operational state of a device, such as a sensor or switch, connected to another port.
  • WO2008/134433A1 discloses a PoE based lighting system.
  • US7587289B1 discloses a PoE powered luminaire that can be controlled from a device remote to the luminaire using the Ethernet connection.
  • Power-over-Ethernet power supply systems are believed to become more and more important in the upcoming years, the power efficiency of such power supplies should be improved.
  • a Power-over-Ethernet power distribution system comprises a plurality of lighting units for producing light according to an illumination requirement. Each lighting unit comprises a driver and a light unit.
  • the power distribution system furthermore comprises a plurality of Power-over-Ethernet switch units having a plurality of ports to which the lighting units are coupled via Ethernet cables.
  • the switch unit furthermore comprises a power supply unit for supplying power for the plurality of ports and the lighting units coupled to these ports.
  • the power distribution system furthermore comprises at least one load management unit for controlling the power supplied to each of the lighting unit coupled to the ports by managing the power supplied from the power supply units to the lighting units to influence loads, which each of the lighting units represent at the ports, for constructing the lighting unit to change its load based on the illumination requirements optimizing the power efficiency of the power distribution system.
  • the load management unit is adapted to manage the power supply to the switch unit based on a) the relationship between the power efficiency and load characteristics of the power supply units and/or b) the relationship between the power factor and load characteristics of the power supply units.
  • Each power supply unit has a specific power efficiency and load characteristic. The power efficiency is typically optimized for 100 percent load and decreases with decreasing loads.
  • the load management according to an aspect of the invention is performed such that a power supply unit in a Power-over-Ethernet switch unit is operated with an improved power efficiency. This can for example be achieved by reducing the power supply to a port to which a load for example in form of a lighting unit is attached such that the power efficiency of the power supply units is optimized instead of optimizing the power efficiency of the loads.
  • a method of power distribution is presented.
  • a plurality of lights is provided for producing light according to illumination requirements.
  • Each lighting unit comprises a driver and a light unit.
  • the lighting units are coupled to ports of a Power-over-Ethernet switch unit via Ethernet cables.
  • a power for the plurality of ports and the lighting units coupled to the ports are supplied by a power supply unit.
  • the power supplied to each of the lighting units coupled to the ports are controlled by at least one load management unit by managing the power supplied to the lighting units to influence loads, which each of the lighting units represent at the ports, based on the illumination requirements optimizing the power efficiency of the distribution system.
  • the power efficiency of a switch unit to which several lighting units are coupled is to be improved.
  • the lighting devices areis controlled by the switch unit such that the lighting requirements are met while the individual lighting devices are controlled such that the overall power efficiency is optimized. This can for example be performed by adjusting the settings for the lighting sources individually.
  • control function according to an aspect of the invention can be implemented in a power sourcing equipment like a Power-over-Ethernet switch unit.
  • Embodiments of the invention relate to Power-over-Ethernet power supply or distribution units or systems.
  • the elements thereof are based on the IEEE 802.3.af and IEEE 802.3.at standard.
  • the cables between the different elements as described below are Ethernet cables, for example Cat5/6 cables.
  • the Power Sourcing Equipment PSE is coupled to powered devices PD for example in form of lighting sources or lighting devices.
  • the power sourcing equipment PSE is supplying the required voltage and current for the powered devices PD.
  • the cables (Ethernet cables) connecting the power sourcing equipment PSE and the powered devices PD can accordingly be used to transmit data as well as to supply the required power to the powered devices PD.
  • Each power sourcing equipment PSE can be implemented as a Power-over-Ethernet switch unit which can have several ports to which powered devices PD for example in form of light sources or lighting devices can be coupled.
  • Fig. 1 shows schematically and exemplarily a block diagram of a power distribution system according to an embodiment of the invention.
  • a central controller 10 can be coupled to a plurality of power sourcing equipment PSE, for example in form of Power-over-Ethernet switches or switch units 20, 30.
  • the Power-over-Ethernet switch units 20, 30 in turn can be coupled to a number of powered devices PD for example in form of lighting units 40, 50, 60, 70, 80.
  • the first Power-over-Ethernet switch unit 20 is coupled to two lighting units 40, 50.
  • the second Power-over-Ethernet switch unit 30 is coupled to three lighting units 60, 70, 80. However, it should be noted that this is just one example. In fact, a plurality of Power-over-Ethernet switch units can be provided which can each in turn be coupled to a number of powered devices PD for example in form of lighting units.
  • the Power-over-Ethernet switch units 20, 30 can act as power sourcing equipment PSE, i.e. they are used to supply power to the powered devices PD in form of the lighting units 40 - 80, respectively.
  • the Power-over-Ethernet switch units 20, 30 are coupled to the powered devices 40 - 80 by means of Ethernet cable (e.g. Cat5/6 cables).
  • Each of the Power-over-Ethernet switch units 20, 30 can comprise a controller 21, 31, a power supply unit PSU 22, 32 and a switch 23, 33. Furthermore, each Power-over-Ethernet switch 20, 30 can comprise a number of ports 25, 35 to which the powered devices PD for example in form of the lighting units can be coupled.
  • the Power-over-Ethernet power sourcing equipment i.e. the Power-over-Ethernet switch units, may also optionally comprise a voltage or current sensor 26, 36 or a detecting unit for detecting the voltage and the current at the ports 25, 35 of the switch unit 20, 30.
  • the Power-over-Ethernet switch units 20, 30 can also be used to transmit data to and from the powered devices PD based on the Ethernet cables and based on Ethernet communication protocols.
  • Powered devices PD can in general be divided into different classes as the powered devices may use different power amounts to be operated.
  • the classification of the power requirements of different powered devices are defined in the IEEE 802.3.af and IEEE 802.3.at standard.
  • Each of the powered devices i.e. each of the lighting units 40 - 80 may comprise a driver 41, 51, 61, 71, 81 and a light unit 42, 52, 62, 72, 82 for emitting light.
  • the lighting devices 40 - 80 each can comprise a controller 43, 53, 63, 73, 83.
  • the drivers 41, 51, 61, 71, 81 each serve to drive the light units 42, 52, 62, 72, 82, respectively. Accordingly, for example based on information received from the central controller 10 or from the Power-over-Ethernet switch units 20, 30, a driver 41 - 81 drives the operation of the light unit, thus controlling the output of the light unit between 0 and 100%.
  • a central controller sends a command to the controller in the light device to dim the light unit down/up.
  • a light controller can translate a dim command into a control signal for the driver, which will change LED current and light output and also the load.
  • the power sourcing equipment PSE or the switch unit 20, 30 will measure load change (e.g. via the voltage and current measured by the sensor 26, 36 at the ports 25, 35 and sent this information back to the central controller.
  • the lighting units can for example be implemented as light emitting devices LED or any other light sources which are dimmable. In addition or alternatively to the usage of LED, OLED can used.
  • the Power-over-Ethernet power distribution system can also be used to supply AC light sources with power. In such a case, a DC/AC converter is needed for the AC light sources to convert the DC supplied by the Power-over-Ethernet system into AC.
  • Such AC light sources can be halogen lamps, high-intensity discharge HID lamps, compact fluorescent CFL lamps, etc.
  • the powered devices PD are coupled to the power sourcing equipment PSE (i.e. Power-over-Ethernet switch units 20, 30), the powered devices PD act as loads for the power sourcing equipment PSE.
  • the power sourcing equipment PSE must provide different amounts of power for the powered devices PD at the respective ports 25, 35.
  • Each of the lighting units 40 - 80 as powered devices PD are designed to have a maximum power efficiency. However, in order to improve the overall power efficiency of the Power-over-Ethernet distribution system, all of the lighting units 40 - 80 and the switch units 20, 30 in the system must be considered.
  • a load management in particular in view of the lighting units 40 - 80 as powered devices PD is provided.
  • the load management can be performed by a load management unit 100 which can be arranged in the control units 21, 31 of the Power-over-Ethernet switch units 20, 30 and/or in the control unit 11 of the central controller.
  • a load management unit 100 can be provided as a dedicated unit separate from the Power-over-Ethernet switch units and/or the central controller 10.
  • the load management unit 100 receives a reference illumination value or a set of reference illumination values as input and controls the operation of the lighting units 40 - 80 (and thereby the loads at the parts of the switch units) in order to provide an illumination which corresponds to the reference illumination value or the set of reference illumination values while the power efficiency of the overall system is optimized instead of the power efficiency of the lighting unit or Power-over-Ethernet switch unit separately.
  • the power efficiency of the lighting units and/or the Power-over-Ethernet switch units are optimized individually or separately, this may not lead necessarily also to an optimized power efficiency of the entire system.
  • Fig. 2A shows a schematic graph indicating the dependency of the efficiency of a power supply unit of a power sourcing equipment in view of a load applied to it according to an embodiment of the invention.
  • the efficiency E is shown as the efficiency in % and the load L is shown in % of the rated output power.
  • the efficiency E drops from above 90% at 100% load to 60% at a load of 0%.
  • the power supply unit is designed to have its maximum efficiency at 100% load. If the system according to Fig. 1 is to be operated at maximum efficiency, each of the supply units must be operated at 100% load. This is, however, not possible as this would contradict any power saving schemes.
  • the implementation of energy saving algorithms day light regulation, occupancy detection, personnel control, etc.
  • Fig. 2B shows a graph indicating the relation between the load and the efficiency of a power supply unit as well as the relation between the power factor PF and the load applied to the power supply.
  • the load L and the efficiency E are again depicted in %.
  • the graph PSUE shows the relation between the load L and the efficiency E of the power supply unit.
  • the dependency of the power factor PF on the load L is depicted by the graph PF.
  • the power factor PF is the relation between the real and apparent power in the power supply unit. As can be seen from Fig. 2B , the power factor PF will increase with increasing load.
  • a high power factor corresponds to a higher amount of real power and a low power factor corresponds to a lower amount of real power and thus more apparent power.
  • Fig. 2B an optimized efficiency area OEA is depicted. This area extends from approximately 50 to 70% load L. In this area, the PSUE efficiency is the highest while at the same time, the power factor PF is still accepted. Hence, the optimum power efficiency E is at around 60% load. As can be seen from Fig. 2A , a 60% load only results in an approx. 5% reduction of the efficiency. As can also be seen from Fig. 2A , the efficiency of the power supply unit is very low (approx. 70% at a load of 10%). Hence, increasing the load and therefore the light output can result in an increased power efficiency (60% instead of 10%) and therefore in a decreased power consumption.
  • this correlation is used in the load management according to an embodiment of the invention to increase the power efficiency of the system.
  • the relation between the power factor PF and the applied load to the power supply unit is also depicted.
  • the power factor PF is low, for example for loads below 30%, the system must provide a considerable amount of reactive energy or apparent energy. If the reactive energy or apparent power is increased, this leads to a decrease of the real power. Furthermore, the entire system must be able to provide the required reactive power.
  • a distribution transformer (not shown) must be provided to supply the required reactive energy. The distribution transformer is not depicted in Fig. 1 . If the distribution system is operated at a low efficiency and a low power factor, this would require distribution transformers that are bigger than those that are actually required in an embodiment.
  • the load management uses these realizations in order to increase the power efficiency of the system.
  • the power sourcing equipment i.e. the Power-over-Ethernet switch units 20, 30, supply the powered devices, i.e. the lighting units 40 - 80 each with a respective power amount to achieve the required illumination.
  • the power supplied to the respective lighting units 40 -80 can be changed in order to achieve the required load of for example 60% for the Power-over-Ethernet switch units 20, 30. This can for example be performed by reducing the power supply to some of the lighting units while increasing the power to some of the other lighting units.
  • loads at the ports of the Power-over-Ethernet switch units which operate at only 10% should be avoided.
  • other lighting units in the vicinity or proximity of the first lighting unit may be supplied with a higher power such that respective load can be increased.
  • the load at a first port may be decreased while the load at a second port may be increased.
  • This variation in the supplied power must, however, take into account that the required illumination should be provided.
  • the illumination of one lighting unit is reduced while the illumination of a second lighting unit is increased to provide the overall lighting requirements or constraints such that the user will not notice the difference.
  • the power efficiency of the overall system will increase.
  • Fig. 3 shows a schematic illustration of a Power-over-Ethernet distribution system in a building according to an embodiment of the invention.
  • a building 200 is depicted having for example a meeting room 210, a hallway 220 and several cell offices 230, 231, 232.
  • two Power-over-Ethernet switch units 20, 30 are depicted, which are coupled to the lighting units 40 - 80.
  • the first Power-over-Ethernet switch unit 20 may be coupled to lighting units in the meeting room 210 as well as in the hallway 220.
  • the second Power-over-Ethernet switch unit 30 may be connected to lighting units in the hallway 220 as well as in the cell offices 230 - 232.
  • the Power-over-Ethernet switch units according to Fig. 3 can correspond to the Power-over-Ethernet switch units according to Fig. 1 .
  • the Power-over-Ethernet switch units 20, 30 provide power for the lighting units 40 - 80 which act as powered devices PD.
  • the Power-over-Ethernet switch unit will control those lighting units which are arranged in the same room to provide for the required illumination. This could for example mean that the light output of one lighting unit is increased while the light output of a second lighting unit is decreased.
  • Fig. 3 for example in the hallway 220 as well as in the cell office 230, lighting units are present which are coupled to the first switch unit 20 as well as to the second switch unit 30.
  • the first and second Power-over-Ethernet switch units 20, 30 may communicate.
  • those lighting units which are coupled to the second switch unit 30 and which are arranged in the cell office 232 can be activated with high loads (and thus higher power) while the lighting units which are coupled to the second switch unit 20 and which are arranged in the cell office 232 can be switched off such that they are not operated.
  • one of the lighting units associated with the second switch unit 30 can be activated and the second one can be deactivated while a lighting unit associated to the first switch unit is activated while the second one is deactivated.
  • the first and second switch units each operate one lighting unit in the cell office 232.
  • the loads at the ports of the switching units are controlled such that they are at a certain percentage where the power efficiency of the power supply units is in at least an acceptable range while still having the illumination requirements in mind.
  • the switch units 20, 30 may communicate with a central controller 10 as depicted in Fig. 1 .
  • the switching units 20, 30 can communicate directly or indirectly via a central controller 10.
  • Fig. 4 shows a schematic graph indicating the relation between a load and the power supply to power distribution units according to an embodiment of the invention.
  • the power P in watts is shown in relation to the load L in percent.
  • the input power Pi, the output power Po and the power loss Pl are depicted.
  • an optimized efficiency area OEA is depicted. This area corresponds to the area where the power loss is at a minimum value, i.e. this area is somewhere in between 45 and 65% of the load.
  • the relation between the load and the power loss is depicted below: Load % 10 20 30 40 50 60 70 80 90 100 Pl Watt 56 39.273 12.706 14.345 9.032 12.522 20.764 26.182 32.276 32.727
  • Fig. 5 shows a schematic illustration of a Power-over-Ethernet distribution system in a building according to an embodiment of the invention.
  • a building 200 can comprise a meeting room 210, a hallway 220 and several cell offices 230 - 232.
  • a first and second Power-over-Ethernet switch unit 20, 30 are provided which are each coupled to a number of lighting units.
  • lighting units L11, L21, L31, L51, L41 are coupled to ports of the Power-over-Ethernet switch unit 20.
  • the lighting units L12, L32, L42, L52, L62, L72, L82 and L22 are coupled to ports of the second Power-over-Ethernet switch unit 30. Therefore, for example the lighting unit L11 in Fig. 5 can correspond to the lighting unit 40 in Fig. 3 etc.
  • the Power-over-Ethernet switch units 20, 30 are each used as Power Sourcing Equipment PSE to provide a power to the different lighting units as powered devices PD.
  • Each of the Power-over-Ethernet switch units 20, 30 can comprise a control unit with a load management unit 100.
  • the first and second Power-over-Ethernet switch unit 20, 30 can be coupled to a central controller 10 (not depicted in Fig. 5 ).
  • the central controller 10 can also comprise a load management unit 100 for performing the load management according to an embodiment of the invention.
  • the first and second Power-over-Ethernet switch units 20, 30 can have a number of ports 25, 35 to which the different lighting units are connected or coupled.
  • the Power-over-Ethernet switch units 20, 30 can also comprise sensors 26 for detecting the current and the voltage at their respective ports 25, 35.
  • the first and second Power-over-Ethernet switch units 20, 30 can also have means for communication with the lighting units.
  • a sensor for detecting the illumination in the meeting room, the hallway and/or the cell offices can be provided as a feedback means in order to ensure that the required illumination is present in the different rooms of the building.
  • the load management unit 100 is used to adjust the output power at each of the ports of the Power-over-Ethernet switching units 20, 30 in order to optimize the power efficiency of the Power-over-Ethernet switches as well as the entire distribution system while still being able to provide the required illumination in the meeting room, the hallway or the cell offices.
  • the power supplied at the respective ports of the Power-over-Ethernet switch units 20, 30 is selected such that the overall load for the switch units or the power supply unit 21, 31 is according to one embodiment approximately 60%.
  • the sensors 26 in the switching units the voltage and the current drawn by the powered devices is detected. Based on these measurement values, the load at each port is calculated and the overall load will then correspond to the sum of the loads at each of the ports of the switching unit.
  • the power outputted at the ports of the switch units are selected such that the overall power efficiency is optimized. For example, this can be done by reducing the light output of a first light unit 40 while increasing the light output of a second light unit 50 in order to achieve a required illumination value.
  • Table 1 shows two load cases for the situation in Fig. 5 .
  • Table 1 PSE1 PSE2 Luminaire nr Luminaire nr L11 10 15 L12 30 20 L21 10 15 L22 30 20 L31 10 15 L32 90 80 L41 30 50 L42 90 80 L51 30 50 L52 90 80 L61 70 80 L62 90 80 L71 70 80 L72 70 60 L81 0 0 L82 70 60 Total Load 30 40 Total Load 70 60
  • the overall load for the case 1 (30 + 70) corresponds to the overall load for the case 2 (40 + 60).
  • Fig. 6 shows a flow chart of a load management process according to an aspect of the invention.
  • step S1 a reference value for the illumination in a room or several rooms is received.
  • step S2 the arrangement and/or capabilities of lighting units are determined.
  • the number of switching units within the environment is determined in step S3.
  • step S4 the voltage and/or current at the ports of the switching units can be determined.
  • step S5 the loads of each of the switch units are determined.
  • the measured loads are compared to a reference. Based on the comparison in step S6, the output power of at least one of the ports of the switch units is varied.
  • step S8 the process stops as the power settings for the optimum power efficiency is achieved.
  • the above described process of load management can be performed at regular intervals or once the lighting system is activated.
  • the above described load management and the Power-over-Ethernet power distribution system can for example be used in a lighting system of an office.
  • the lighting system will have standard default lighting settings according to the EN12464 standard.
  • the illumination for a desk should e.g. be > 500 lux.
  • the lighting environment will be defined according to the lighting design which includes the light output of the lighting devices, maintenance factors, the size and type of the lightings or luminaires.
  • the lighting requirements may be different for different parts of an office. For example, the lighting requirements are different for a hallway as compared to a desk area or a cell-office or a meeting area.
  • the information regarding the environment of the illumination system or lighting system can be programmed, included or made available into the lighting system.
  • the load management system can have access to this data and information.
  • Each of the lighting devices can be coupled to a port of a power sourcing equipment PSE such that the lighting devices can be supplied with power.
  • the load management unit will also have access to information regarding the configuration or commission of the lighting system which includes the position of lighting devices in the building, the number of lighting devices, the light behavior of the devices, the room types (cell-office, meeting room, etc.) where lighting devices are present.
  • the load management unit can have access to the entire environment and arrangement of the lighting system.
  • the load management unit can also have access to the control algorithm of the lighting system such as the energy saving algorithms.
  • the control algorithms will define the light output of the lighting units and thus the load of the lighting units. The light output and therefore the load can, however, change as a function of daylight and/or whether the room is occupied or not.
  • the load management will be performed such that the actual illumination and thus the light output of the system will remain the same the designated areas while the load of the entire system is optimized in view of the power efficiency.
  • a lighting system which comprises a Power-over-Ethernet distribution system to which a plurality of lighting units is coupled.
  • the Power-over-Ethernet distribution system serves to provide the power for the different lighting units.
  • the distribution system comprises a load management unit for managing the loads at the Power-over-Ethernet switching units in order to achieve an optimized power efficiency and/or an optimized power factor.
  • the load management can be performed indirectly.
  • the load management units can perform the load management by instructing the lighting units to change their loads.
  • the load management units can therefore be able to initiate a load change of the light units as required by the overall load management.
  • an eMerge DC distribution system can be provided based on the same principles as above.
  • the eMerge is a DC standard used mainly for lighting in US offices (see www.emergealliance.org).
  • a single unit or device may fulfill the functions of several items recited in the claims.
  • the mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
  • These procedures and the control of the power distribution system in accordance with the power distribution method and/or in accordance with the assigning method can be implemented as program code means of a computer program and/or as dedicated hardware.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Direct Current Feeding And Distribution (AREA)

Claims (4)

  1. Système de distribution d'électricité par câble Ethernet (Power-over-Ethernet PoE), comprenant :
    une pluralité d'unités d'éclairage (40-80) pour produire de la lumière selon des exigences d'éclairage, chaque unité d'éclairage (40-80) comprend un circuit de pilotage (41, 51, 61, 71, 81) et une unité lumineuse (42, 52, 62, 72, 82) pour émettre de la lumière, et
    une pluralité d'unités de commutation PoE (20, 30) chacune ayant une pluralité de ports (25, 35), auxquels les unités d'éclairage (40-80) sont couplées via des câbles Ethernet, et une unité de fourniture d'électricité (22, 32) pour fournir de l'électricité pour la pluralité de ports (25, 35) et les unités d'éclairage (40-80) couplées aux ports (25, 35),
    le système comprend en outre :
    au moins une unité de gestion de charge (100) pour commander l'électricité fournie à chacune des unités d'éclairage (40-80) couplées aux orifices (25, 35) en gérant l'électricité fournie à partir de l'unité de fourniture d'électricité (22, 32), via la pluralité de ports (25, 35), aux unités d'éclairage (40-80) pour influencer les charges, que chacune des unités d'éclairage (40-80) représente au niveau des ports (25, 35), ou pour ordonner à au moins une unité d'éclairage (40-80) de changer sa charge, sur la base des capacités des unités d'éclairage (40-80), des positions des unités d'éclairage (40-80) et des exigences ou des contraintes d'éclairage de sorte que chacune de la pluralité d'unités de commutation PoE (20, 30) est mise en oeuvre à un rendement électrique optimisé, et
    caractérisé en ce que
    l'unité de gestion de charge (100) est conçue pour gérer l'électricité fournie aux ports (25, 35) de la pluralité d'unités de commutation PoE (20, 30) sur la base a) d'un rendement électrique et de caractéristiques de charge des unités de fourniture d'électricité (22, 32) et/ou b) d'un facteur électrique et de caractéristiques de charge des unités de fourniture d'électricité (22, 32).
  2. Système de distribution d'électricité PoE selon la revendication 1, dans lequel
    les exigences d'éclairage incluent des exigences de sortie de lumière.
  3. Procédé de distribution d'électricité dans un système de distribution d'électricité PoE, comprenant les étapes de :
    production de lumière selon des exigences d'éclairage par une pluralité d'unités d'éclairage (40-80), chacune ayant un circuit de pilotage (41, 51, 61, 71, 81) et une unité lumineuse (42, 52, 62, 72, 82) pour émettre de la lumière,
    le couplage des unités d'éclairage (40-80) à des ports (25, 35) d'une pluralité d'unités de commutation PoE (20, 30), et
    la fourniture d'électricité pour la pluralité de ports (25, 35) et les unités d'éclairage (40-80) couplées aux ports (25, 35) par une unité de fourniture d'électricité (22, 32) dans l'au moins une des unités de commutation PoE (20, 30),
    le procédé comprend en outre l'étape de :
    exécution d'une gestion de charge en commandant l'électricité fournie à chaque unité d'éclairage (40-80) couplée aux ports (25) en gérant l'électricité fournie en provenance de l'unité de fourniture d'électricité (22, 32), via la pluralité de ports (25, 35), aux unités d'éclairage (40-80) pour influencer des charges, que chacune des unités d'éclairage (40-80) représente au niveau des ports (25), ou pour ordonner à au moins une unité d'éclairage (40-80) de changer sa charge sur la base des capacités des unités d'éclairage (40-80), des positions des unités d'éclairage (40-80) et des exigences ou des contraintes d'éclairage de sorte que chacune de la pluralité d'unités de commutateur PoE (20, 30) est mise en oeuvre à un rendement électrique optimisé, et
    caractérisé en ce que
    la gestion de charge est effectuée sur la base a) d'un rendement électrique et de caractéristiques de charge des unités de fourniture d'électricité (22, 32) et/ou b) d'un facteur électrique et de caractéristiques de charge des unités de fourniture d'électricité (22, 32).
  4. Produit formant programme informatique pour distribuer de l'électricité à l'intérieur d'un système de distribution d'électricité PoE, le produit formant programme informatique comprenant un moyen formant code de programme pour amener le système de distribution d'électricité PoE à effectuer toutes les étapes du procédé de distribution d'électricité comme revendiqué dans la revendication 3, lorsque le produit formant programme informatique est exécuté sur un ordinateur commandant le système de distribution d'électricité PoE.
EP15711460.4A 2014-03-24 2015-03-13 Système de distribution de puissance à alimentation électrique par câble ethernet Not-in-force EP3123829B1 (fr)

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EP14161354 2014-03-24
PCT/EP2015/055277 WO2015144457A1 (fr) 2014-03-24 2015-03-13 Système de distribution d'électricité power-over-ethernet

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JP6764342B2 (ja) 2020-09-30
US10172214B2 (en) 2019-01-01
CN106464504A (zh) 2017-02-22
EP3123829A1 (fr) 2017-02-01
JP2017519325A (ja) 2017-07-13
US20170111976A1 (en) 2017-04-20
WO2015144457A1 (fr) 2015-10-01

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